She was recovering from injuries sustained while jumping into a lake when she took a near-fatal drug overdose at home.

Another unnamed 15-year-old girl was also critically injured after falling on to snowy ground from a fifth floor flat in the city of Krasnoyarsk, also Siberia. Two days earlier, a 14-year-old girl from Chita was reported to have thrown herself under a commuter train.

The Russian parliament proposed a bill bringing about criminal responsibility for the creation of pro-suicide groups on social media. This will need to be signed by President Vladimir Putin and would see those who incited others to commit suicide jailed for up to four years.

The Siberian Times

Yulia Konstantinova, 15, joined her friend Veronika in jumping from the roof of a 14-storey block of flats

What are police doing to investigate Blue Whale related deaths?

Cops are said to have launched a probe into the sick craze sweeping Russia - the suicide capital of the world.

It was reported that two teenage boys were detained by police at the scene after allegedly filming the tragic double suicide of Yulia and Veronika.

The Russian Investigative Committee has opened a probe on “incitement to suicide” regarding the pair’s death.

In Krasnoyarsk, law enforcement recently opened three criminal cases of incitement to suicide involving schoolgirls via the groups on social media. In all three cases, the teenagers were rescued.

One local school director told police he had received an anonymous call saying a student had joined a “group of death” and planned soon to kill herself.

The Siberian Times

Cops believe Veronika Volkova, 16, fell to her death on Sunday after being manipulated by sinister social media group

The police identified the girl who explained that she had joined a “game” and had been given “tasks” by the group administrator.

She did not obey the commands, which involved self-harm, but there are fears that others did.

In the Chita case, transport police confirmed the game is a possible “cause of death”.

Last year, an alleged ringleader named as 21-year-old Philipp Budeikin was detained, and he has been charged with organising eight groups between 2013 and 2016 which “promote suicide”.

Some 15 teenagers committed suicide, and another five were rescued at the last moment, according to the case against him.

What is Instagram doing to stop the game spreading?

Instagram has started showing users a warning when they search for pictures relating to Blue Whale.

When you search for the term on the network, a notification appears which reads: “Posts with words or tags you’re searching for often encourage behaviour that can cause harm and even lead to death.

“If you’re going through something difficult, we’d like to help.”

But directly underneath the post it gives the option to “see posts anyway”.

There are several shocking pictures of self-harm and even jokes about the sick game once you click through.

Some include pools of blood on the floor, while others appear to show a whale carved onto an arm.